Zinc is one of the essential trace elements, is present throughout the body in many tissues but is not stored at any particular site. Zinc deficiency can occur where zinc needs exceed the intake or in case of malabsorption. Alcoholism, pregnancy & burns are often associated with zinc deficiency. Zinc levels decrease in response to infections, so a low result may not necessarily mean a person is zinc deficient. Clinically, Zinc deficiency leads to hair loss, poor wound healing, dermatitis, and impaired immune function. In children, it can cause growth retardation. Since zinc can be excreted in the urine/feces, high levels are rarely seen. Excessive supplementation of Zinc leads to toxicity. Serum zinc test is available at affordable cost, with a free home collection.